The Peterson Fluid Systems .625-inch spline-drive hub spacer for Big Block Chevrolet applications provides controlled offset for accessory drive assemblies. It is made to work with Peterson spline drives and accepts Gilmer or HTD belts to maintain correct belt tracking on ATI/MSD-style setups. Choose the .625" spacer when precise spacing is required for big block Chevy accessory alignment.
Peterson Fluid Systems Spacer .625 Big Block Chevrolet ATI MSD